Kameron8

I recently decided to switch to a carb setup with an MSD 6014 box on my stock 5.3. I have a 750 carb for the setup but i've been told that I will probably need to jet it down to run on my 5.3. Can anyone tell me what size jets should I run?

G Atsma

You would actually be far better off with a 600 cfm carb on a stock 5.3.
At 5000 RPM, a 5.3 only passes not quite 400 cfm in street use. But there aren't any 400 cfm 4bbl carbs.
Jetting is going to be close as delivered. Fine tune it once up and running.

Doug G

Best bet would be as above... stock jetting.

Get an AFR gauge and dial in from there.

600-650 VS would be a better choice on the street.

1988montecarloss

iTrader: (6)

there isnt an exact answer to this as there are too many factors to say XYZ jet for XYZ combo, buy a wideband o2 sensor and go off of what it tells you

Scott Danforth

plenty of 450 and 470 cfm carburetors. I would run a 600 or 650 on a stock 5.3 only turning 5000 RPM. save the 750 when you get an aggressive cam and bring the RPM's up closer to 7k

G Atsma

Kameron8 hasn't been here since his first post above

Tondo

I thought i was the only one that noticed

IGN-1A

Hi, I would MOST OFTEN fit a Holley # 4609 because it had Booster Ventures.
They increased that option on other designs, is your Carbe fitted with that option ?
Lance

G Atsma

See my note 2 posts above

LilJayV10

iTrader: (39)

oh no, there is ALWAYS someone watching....